Boom of excavator



FIG. 1 is a front view of a boom of excavator showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a cross sectional view taken along line 6--6 in FIG. 1;

FIG. 7 is a cross sectional view taken along line 7--7 in FIG. 1;

FIG. 8 is a reduced front, left perspective view of the boom of excavator; and,

FIG. 9 is a reduced front, right perspective view thereof. 

The ornamental design for a boom of excavator, as shown and described. 